sde-nopaste: changed to not warn for obvious plain text

bin/sde-nopaste

@@ -52,6 +52,7 @@ text/x-c) lang=c ;;
 *)
 	case "$type" in
 		empty) exit ;;
+		ASCII*) lang=text ;;
 		"diff output text") lang=diff ;;
 		*)	echo_warning "Assuming plain text (type:$type mime:$mime)"
 			lang=text ;;